Dust-collector



N. W. HOLT. DUST ooLLBGToR.

3 Sheets-Sheet 2.v

(No Model.)

.Patented June 6, 18,82.

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3 Sheets-'Sheet 3.

N.- W; Hour.v DUST COLLECTOR.

(No Model.) A

Patented June Y6, 1882,YV

Ha. MWWWMUMEMQ Y liz/v e /1 UNITED STATES PATENT OFFICE.

NOAH' W. HOLT, OF BUFFALO, NEW YORK, ASSIGNOR TO CHARLES R.

KNicKERBocKER, oF

JACKSON, MICHIGAN.

DUST-COLLECTO R.

SI-PECIFICATION forming part of Letters Patent No. 259,154, dated June 6, 1882,

Application sied Aprn 18,1882. (No model.)`

To all whom it may concern;

Beit known that I, NOAH W. HoL'r, a cilizen of the United States, residing at Bualo, in the county ot' Erie and State ot' New York, have invented certain new and useful Improvements in Dust-Collectors, of which the following is aspecilication, reference being had therein tothe accompanying drawings.

I employ two or more cloths or screens for collecting the dust, of which one or more are performing the work ofcollecting dust while the cleaning of the other or others is being ef fected. Preferably-these cloths are arranged vertically, being so situated that chambers or bags are formed. The cloths and the cham-y bers may be arranged parallel t0 each other throughout the Whole series; or they may-be arranged on lines radial to a common center.

I employ traveling devices fordislodging the dust, which are placed in close proximity to the cloths or to the frames which hold them. When the cloths or chambers are arranged parallel to each other throughout the whole series the traveling dust-dislodging devices are preferably so placed as to travel on straight lines. When the cloths or chambers are arranged ra.- diall-y around a common central line. the dustdislodging devices are so arranged as to nuove around the said central line and to be carried by a shaft mounted on that line. The cloths l or chambers are so situated as to be all supthefd ust.

plied from a common duct. rIhe cloths are secured to frames or supporting-pieces. These supporting-pieces are so arranged that at least one end or edge of the cloths or chambers can be moved when thedust is to be dislodged, and may be arranged so that both ends shall be moved together. By means of the supporting frame or frames two or more of the cloths are connected in such manner that they shall be simultaneously moved when the dust is to be dislodged, for when so connected a chamber or bag may be formed with the cloths, which chamber or bag can at one time be opened for receiving an air-current and at another time closed to permit the dislodging of Those ends of the collecting-chambers'which receive the air-current are inclosed by'a tight chamber situated between the colin g dislodged therefrom.

ates to guide the air which it receives with the dust into the collecting-chambers and to hold a traveling cut-oli', a dnst-dislod ging mechanism, and adust-withdrawing mechanism. The collecti 11g-chambers are open at one end to receive the dust-laden air, and at the opposite ends they are closed or covered, the closing or covering devices operating to compel the air to pass through the cloths before escaping. A cutoft' or damper is arranged to travel across the open ends or sides of the collecting-chambers, which operates to shut the air-current olf from the chambers successively while the dust is be- With these collecting cloths or chambers and the traveling devices which move the cloths for dislodging the dust I combine devices which receive and remove the dust after it has been dislodged from the cloths. If the air is introduced at the lower ends of the collecting-chambers, the dustupward preparatory to dislodging the dustlifting devices are preferably employed, consisting of one or more cams, wedges, or inclined surfaces arranged to travel in proximity to the cloth-holders, successively moving them in turn to dislodge the dust. The cam or moving device operates to move each sheet ot' the cloth in a direction substantially parallel with that in which the cloth is supported when atrest.

With the cloths are combined devices that operate by elasticity, resiliency, or springing to give them a quick jerk to more 'eft'ectually dislodge the dust. To remove the accumulated dust after it has been dislodged, I employ one or more bars or carrying-pieces situated across chamber in front of one or more of them,

wherein .the dust can be received. Preferably two or more bars or carrying-pieces are employed and so arranged as to form walls both in front of the dislodged dust and behind it.

The devices which move the cloth can be connected to the bars or carrying-pieces which remove the dust, and can be arranged to move together with them, the cloth-moving devices being a little ahead of the dust-withdrawing devices, so that the dust shall be dislodged from the cloth in time to be received properly in the space intended for it in front of the appropriate carrying-piece.

In the drawings I have shown a mechanism of one of the forms that can be used to embody my invention.

Figure lis a vertical section on line 1 1, Fig. 2. Fig. 2 is a horizontal section on line 2 2, Fig. 1. Fig. 3 is a vertical transverse section on line 3 3, Fig. 2. Figs. 4 and 5 are detached views on a large scale. Fig. 6 shows the same cloths and collectingchambers arranged radially around a common center, and also the same dislodging devices.

In thc drawings, the collecting-cloths are represented by A A'. They are secured to supporting-pieces in such manner that they can be held properly to receive the dust-laden air. They are shown as being arranged in pairs, the successive pairs forming chambers or bags. A suitable number of these pairs of cloths or chambers are arranged together to form a machine. To the cloths or chambers thus arranged together the dust-laden air is brought through the inlet-passage H2. Between the inlet-passage or duct and collecting chambers I arrange an intermediate chamber, H, iuclosed by a housing or walls, H. This chamber distributes the air properly to the collecting-chambers formed by the cloths.

The cloth chambers or bags are shown to be each supported at the top by means of a piece, B', to which they are attached,and at thebottom by means of another supporting-piece, B. At their outer edges they are secured to stationary supporting-pieces C O. At their inner edges they are arranged to be moved for the purpose of dislodging the dust. They are secured at their inner edges to a supporting piece or rod, l). It will be seen that a chamber or bag is formed by means of the opposite cloths, A A', upon which the dust will be deposited, and through which the cleansed air can escape outwardly from the machine. The ends of the cloths or chambers opposite to those which receive the air-current are closed by one or more lexible devices, b', formed preferably ot' cloth, which, while permitting the other portions of the collecting-cloth to be moved sufficiently, yet prevent the escape of the dust-laden air and compelit to pass through the cloths. This not only operates as a cover or closing device, but also as a flexible extension of the other cloths.

A traveling cut-oft or valve is employed to close the chambers or bags alternately. In the construction it is formed by means of a piece of ilexible material, K, and bars I I, so related to the chambers that they can shut oli' the air from one or more of them. This traveling cut-off is situated opposite to the permanent cover or closing device above described, which causes the air to go through the vertical cloths.

J represents the device employed to move the cloths for the purpose of dislodging the dust. It travels continuously from one cloth or chamber to the next. It is shown to be made in the form of a cam or incline which operates to lift up the cloths orcollecting-chambers, it being moved in any suitable way-as,

for instance, by chains g and sprocket-wheels on shafts driven by pulley I. The cam moves under the cloths or chambers and elevates to a sucient distance the frame or supportingpiece at the lower end of the cloth, and after the cam has passed from under the cloth or its supporting-piece the latter is brought back into its original position both by means of gravity, and also by the elasticity, resiliency, or springing ot' the parts attached to thecloth. rIhis results in the dislodgingof the dust which has been caught upon the cloths A A. The dust that is dislodged drops downward from the collecting-chambers into the chamber H below them, where it is received by the withdrawing mechanism composed of the carrying-pieces I, which take it to a suitable place for depositing, as to a hopper or receptacle, S, communicating with the chamber H below the collecting-chambers.

It will be seen that the cloths are suspended in the frames so as to form tight sacks or bags, with which the dust-spout communicates, and that with them are combined devices for imparting a shaking or jarring motion to the cloth and the chambers or bags formed with them. It will also be seen that as the inductionopening is arranged centrally relatively to the machine, and as the air is conducted into the chambers on vertical lines, the heavy particles of dust will settle by gravity and before reaching the collector-cloths, thus lessening the screening duty of the cloth, so that it can more readily be kept clean and open.

The moving devices form a dead-air space, this space being iuclosed by the cross-bars I I at the ends of the series and by the chambers above successively.

When a mechanism like that shown is used a suitable notch or recess may be made in the end portion, h, of the housing H to permit the passage ot' the lifting or cloth-moving mechanism, and the traveling devices may be supported on the machine, as shown at M M.

In addition to the central vertical strips, D, other narrow strips may, if necessary, be employed, as shown at d cl, and also transverse rods or bars D at intervals.

The cloths A A are preferably attached to their supports, so that they can be stretched IOO IIO

from time to time as they become slack. For this small cleats c c may be used, they having the ro vertically and radially therein.

5 one or more times to take up the slack cloth,

and then tacking them again to the frame.

My invention may obviously be applied in a cylindrical apparatus having a vertical axis, and having the stationary cloths arranged The traveling devices are in this case madeto revolve in a horizontal plane about the axis ot' the, cylinder, the dislodging mechanism being the same that is employed .withl the above-described 4 r 5 construction,and provisionbeing made in any one of many obvious waysto discharge the dust.

Although I hereinv describe the filtering or collecting chambers as being stationary, I do zo not wish to be understood as meaning that the cloths and the movable parts immediately connected to the cloths cannot in any wise move. The chambers are stationary in contradistinction to the collecting-chambers heretofore used,

which have been so supported that they could be revolved or moved relatively to the main supporting-frame and relatively to the dustdislodging devices. It will be seen that the chambers in my case are substantially stationary, while the dust-dislod gin g devices move from one chamber to another. The cloths are sufficiently movable to snap oi theA dust; but the chambers themselves do not rotate, as is v customary in somernachines. The walls ofthe housing and the boards or bars between the chambers at the ends which receive the dust-laden air operate as air-guiding devices to compel the air from the trunk to pass to the cloths and through them, they 4o being supplemented by the vertical parts Gand theexible extensions b. Instead ofthe wooden .bars C at the outer ends of the chamber, cloth might be employed, as will be readily understood, secured to the partsc and to the connecting and supporting cross-bars B2, the part c in this case being inserted into or fastened to the main frame at the bottom and to said cross-bars B2 at the top. However, in some respects the bars in the construction shown 5o are preferred, as a rmer and more elastic support is given to the cloths, insuring a sharp strong jerk when they escape from the lifting devices.

The elasticity ot' the parts B and B', which snap the cloth, can be supplemented by springs, if desired, though I have found that the snapping resulting from the devices-shown is sufficient under all ordinary circumstances. If the lower bar, B, of each chamber should be made 6c non-elastic, as by forming it in two parts loosely joined at the center, and the opposite upper part, B,'should be arranged as now, it, together with the center part, D, will operate as a clothmoving frame, the flexible extensions b vbeing also connected, as now, to the ends of the col-` lectng-chambers in such way as to permit the cloth-moving framel to be moved relatively to the main frame and at the same time prevent the dusteladen air from escaping at points beyond said cloth-moving frame.` However, airstopping devices of-a more or less modified character may be used at the ends of the collecting-chambers opposite to those which receive the air without departing from the spirit of the invention. 1

I am aware that use h as been made heretofore of filtering-cloths arranged in zigzag planes, and that with them there have been combined devices to dislodge the dust 5 but in these constructions all the collecting-surfacewas situated in a single chamber, into which the air was conducted in such manner that the currenthad to be stopped entirely while dislodging the dust.. I, on the contrary,'have a series of chambers independent of cach other, with the cloths attached to indepeudentframes, and combine with them devices which move from chamber to chamber to actuate the clothmoving frames, and combine with them also a series of elastic devices to snap the cloths independently of each other one after another. I avoid stoppingentirely the air-current, so that there are no checks or pulsations caused 1n it.

In this case I claim nothing except the combinations specifically set forth in the following claims, reserving to myself' the right to claim all other patentable features in another application which I have filed, and of which this is adivision.

-1. The combination of the air-trunk, the vertical cloths arranged toform stationary chambers, and traveling devices which cut the air oft' from the collecting-chambers successively to permit the dust to'be dislodged, substantially as set'forth.

2. The combination ot' the vertical cloths arranged to form stationary collecting-chambers, the air-trunk which supplies the dust-laden ai-r, an intermediate chamber between the airtrunk and the collecting-chambers, and arranged to guide the air into the ends of the collecting-chambers, air-stopping devices at the ends of the collecting-chambers opposite to those ends which receive the air, and'a. travcling. cutoff adapted to intermittently stop the air from passing through the walls ofthe stationary collectingehambers, substantially as set forth. L

3. The combination ofthe vertically-arranged stationary cloths, theair-trunk which conducts the dust-laden air to the cloths, the devices IOS which guide the air from the trunk through formin g substantially stationary vertical chambers, the devices which guide the air into the chambers on vertical lines, a cam or incline which moves the cloths at the lower ends, and a traveling dust-carrying device connected to and traveling with the cloth-moving mechanism, substantially as setforth.

5. The combination of the vertical cloths forming stationary' vertical chambers, the devices whicll guide the air into the chambers on vertical lines, a traveling cam or incline tor lifting the clot-hs ant the inner ends, and a traveling dust-carrying device connected to the cloth-moving mechanism and arranged to have the cloth-moving mechanism in advance of the dust-carrying devices, substantially as set forth.

6. The combination of the main frame, the vertical cloths, the vibratable frame pieces attached independently of each other to the cloths, devices for lifting the vibratable frame` pieces independently of each other, and a series of elastic devices respectively attached to the vibratable frame-pieces and arranged to return the cloths successively after they have been lifted, whereby the cloths are one after another snapped or jerked for dislodging the dust, substantiallyv as set forth.

7. The combination of the air-trunk, the vertical cloths arranged to form stationary chambers, an nclosing intermediate chamber between the air-trunk and collecting-chambers, and traveling devices which cut the air olffrom the collecting-chambers successively to permit the collected dust to be dislodged, substantially as set forth.

8. The combination of the vertically arranged cloths forming chambers which receive the air on vertical lines, a chamber below the collecting-chambers, into which tliedislodged dust dr0ps,the mechanism which shuts off the air from one or more chambers independently of theothers,and a traveling pocket or receptacle mounted in said lower chamber below the collecting-chambers and moving from one to the other, substantially as set forth.

9. In a dust-collector, the combination of a series of collecting-chambers, an air-trunlr arranged to supply air to several of the chambers simultaneously, and flexible extensions which are connected to the ends of the main collecting-chambers opposite to the air-trunk, and which permit the cloth-moving frame to be moved relatively to the main frame,bnt prevent the dust-laden air from escapingat points beyond said cloth-moving frame, substantially as set forth.

l0. In a dust-collecting machine having a series of chambers, the combination of an airconduit which supplies air to several chambers simultaneously, ltering-cloths arranged to form said chambers, vibra-table bars or frames connected to the cloth, and ilexible extensions attached to said vibratable bars or frames and situated at the ends of the chambers opposite to the air-conduit, substantially as set forth.

1l. The combination, with the vertically-arranged cloths adapted to have the dust drop below them when it is dislodged, ofa cam arranged to travel from chamber to chamber in horizontal planes to lil't a portion of each of the cloths preparatory to dislodging the dust, substantially as set forth.

l2. The combination of the frame I) B B with the vertical cloths arranged in pairs and made stationary' at their outer edges, and se# cured at their inner edges to the verticallymovable rods D, at their upper edges to the swinging bars B', and at their lower to the swinging bars B, substantially as set forth.

13. The combination ofthe main frame-work, the collecting-chambers extending inwardly from both the opposite edges or sides of the main frame, and having vertically-movable supports on substantially the central line of the frame-work, and mechanism for jarring simultaneously the two opposite chambers, substantially as set forth.

14. In a dust-collector, the combination of a series of collecting devices, each having two vertically-arranged cloths secured to a. vibrating bar at the lower ends and between the cloths, an opposing vibrating bar at the upper ends,arisingand falling bar at the inneredges, connected to the top and bottom vibrating bars, and stationary supports for the outer edges ofthe cloth, substantially as set forth.

15. In a dustcollector,the combination of a main frame, collecting-chambers arranged in pairs, the chambers of each pair being on opposite sides of the central line of the main frame, the filtering-cloths which form the eol-v leeting-walls ot' said chambers, vertically-movable bars attached to the inner' edges of the cloths, and cloth-lifting devices which are mounted on substantially the central line of the main frame and elevate the verticallymovable bars at the inner ends of the collecting-chambers, substantially as set forth.

16. In a dust-collector, the combination of the main frame, the chambers extending inwardly from the sides or edges of the frame and arranged in pairs, the cloths having their vertical inner edges attached to verticallymovable bars, the bottom vibrating bars, B, each attached to the lowerendof two adjacent cloths, and the upper supporting-bars, B', respectively opposite to the bars B, said bars B and B being arranged, substantially as set forth, to have the air pass out horizontally or laterally between them.

In testimony whereof I affix my signature in presence of two witnesses.

NOAH NV. HOLT.

Witnesses:

A. B. KELLOGG, E. L. BURDICK.

ICO

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